a, b, c, d = [float(temp) for temp in input().split()]
from math import sqrt
dis = sqrt((c - a) ** 2 + (d - b) ** 2)
print('%0.5f'%dis) float(temp) for temp in input().split() for temp in input().split() temp input().split() ().split () input split for temp in input().split() float(temp) float temp a, b, c, d = [float(temp) for temp in input().split()] a [float(temp) for temp in input().split()] b c d from math import sqrt dis = sqrt((c - a) ** 2 + (d - b) ** 2) dis sqrt((c - a) ** 2 + (d - b) ** 2) sqrt (c - a) ** 2 + (d - b) ** 2 (c - a) ** 2 c - a c a 2 (d - b) ** 2 d - b d b 2 print('%0.5f'%dis) print '%0.5f'%dis '%0.5f' dis d = [float(temp) for temp in input().split()] [float(temp) for temp in input().split()] d b, c, d = [float(temp) for temp in input().split()] [float(temp) for temp in input().split()] b a, b, c, d = [float(temp) for temp in input().split()] [float(temp) for temp in input().split()] a dis = sqrt((c - a) ** 2 + (d - b) ** 2) sqrt((c - a) ** 2 + (d - b) ** 2) dis c, d = [float(temp) for temp in input().split()] [float(temp) for temp in input().split()] c
a, b, c, d = [float(temp) for temp in input().split()]
from math import sqrt
dis = sqrt((c - a) ** 2 + (d - b) ** 2)
print('%0.5f'%dis)